Hartford to Sarnia: Road Trip Guide & Distance

How far is Hartford from Sarnia?

The distance from Hartford to Sarnia is 503.4 miles (810.2 km) as the crow flies. Sarnia is located WNW of Hartford. By car, the driving distance is approximately 604.1 miles, taking about 12h 9min. A direct flight would take roughly 1h 31min. Hartford is in Connecticut, United States, while Sarnia is in Ontario, Canada.

This is a serious multi-day road trip! We strongly recommend breaking this journey up with an overnight stay to ensure you arrive safely and refreshed. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare. Keep in mind this route crosses international borders. Don't forget your passport, and check current border crossing times and vehicle insurance requirements.

Coordinates come from public place data for Hartford and Sarnia. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.